Row marker



Oct; 23,1956 M. E. BOEM-ca 2,767,635

' ROWl MARKER Filed June 17,- 1955 v Mart/'n E; Hoen/'g INVENToR.

Attorneys ROW MARKER Martin E. Boenig, Woodsboro, Tex. Application June17, 1955, Serial No. 516,287 2 Claims. (Cl. 97-230) My invention relatesto row markers of the type attached to the front tool bar of a tractorplow for lowering and raising into and out of marking position bylowering and raising of the tool bar to lower and raise the plow intoand out of the ground, and is designed as an improvement over the rowmarker of my U. S. Patent No. 2,613,586, dated October 14, 1952.

The primary object of my invention is to provide a row marker blade on amarker arm for pivoting vertically to compensate for travel of the bladeover uneven ground, and means for automatically raising the arm when thetool bar is raised to thereby raise the marker blade out of markingposition when the plow is raised out of the ground.

Another object is to provide an extensible boom for mounting the markerarm on the tool bar at selected distances from the plow, and means forpivotally mounting the boom on the tool bar for swinging into uprightposition to swing the marker arm and marker blade close to the tractorto facilitate driving the tractor through gates and along roads.

Still another object is to provide cable and pulley means for loweringand raising the marker arm and marker blade out of and into the groundin response to lowering and raising of the plow beam.

Other and subordinate objects together with the precise nature of myimprovements will become readily apparent when the following descriptionand claims are read with reference to the drawing accompanying andforming part of this speciiication and in which:

Figure l is a fragmentary View in perspective of my improved row markerattached to the tool bar of the tractor;

Figure 2 is an exploded view in perspective partly in section of theboom and means for mounting the same on the tool bar; and

Figure 3 is an enlarged fragmentary view in longitudinal section of theboom.

Referring to the drawings by numerals, according to my invention, a boom1 comprising tubular telescopic outboard and inboard sections 3, 5,laterally with respect to the tractor 9 is pivotally mounted, by meanspresently described, on the outer end of the front tool bar 7 of atractor 9 for lowering vertically to extend outwardly from said bar 7parallel therewith and laterally of the tractor 9, as shown in fulllines in Figure 1, or to be swung upwardly into upright position closeto the tractor 9, as shown in dotted lines in Figure 1. The

outboard boom section 3 is slidable in the inboard boom section tolengthen or shorten said boom. Setscrews 10 in the inboard boom section5 secure said sections together when the boom 1 is extended orcontracted.

The means for mounting the boom 1 comprises a clamp 11 on the outer endof the tool bar 7 which, as is usual, is square in cross-section. Theclamp 11 cornprises a bottom clamp section 13 of V shape in crosssectionfitting upwardly against said bar 7, and a rela- 'tively shortersimilarly shaped top section 15 tting over nited States Patent lO2,767,635 Patented Oct. 23, 1956 the top of said bar 7, sections 13, 15being provided with longitudinal, apertured siderflanges 17, 19 securedtogether by bolts 21. A channel guide 23 is welded, as at 25, in theouter end of the bottom section 13 and opens upwardly. The inboard boomsection 5'is pivoted at its inner'end in the guide by a cross-bolt 27with a nut 28 so that the guide limits downward swinging of the boom 5to horizontal position and prevents side sway of said boom 5 whenhorizontal.

The marker arm 29 is mounted on the outer end of the outboard boomsection 3 by means of the following. A cross-bar 31 is weldedintermediate its ends, as at 33, on said outer end of the outboard boomsection 3 and which extends vertically with a rearwardly extending upperarm 35 when said boom 1 is lowered and the marker arm 29 extendingrearwardly from its lower end and pivoted, as at 37, thereto forvertical swinging relative to the lowered boom. A shank bar 39 on thetrailing end of the marker arm 29 adapted to depend therefrom carries amarker blade 41 bolted thereto, as at 43, and reversible end for end forinterchanging said ends.

The cable means comprises a cable 45 attached at one end, as at 47, tothe marker arm 29, trained over a pulley 49 on the arm 35 to pull saidmarker arm 29 upwardly when the boom 5 is lowered and also trained fromsaid pulley 49 over the lowered boom 5 longitudinally thereof with itsother end fastened, as at S1, to a vertical upright 53 on the plow beam55 lixed, as is usual, on the tool bar 7. Intermediate its ends, thecable 45 is trained over a pulley 57 on an upstanding rocker yoke 59which rocks forwardly and rearwardly to raise and lower the plow beam 55and plow 61.

The pulley 57 is oscillated by the rocker yoke 59 forwardly andrearwardly above the attached end 51 of the cable 45 and above thepulley 49, that is, when the boom is lowered, and for a purposepresently seen,

The rocker yoke 59 forms part of a conventional lift mechanism forrocking the tool bar 7 in opposite directions to raise and lower theplow 61 and is pivoted on a shaft 63 on the tractor 9, operativelyconnected to the plow beam 55 to raise and lower the same by a crank 65on the yoke, and a rod 67 connecting the crank 65 to the upright 53. Theyoke 59 is operated by a crank arm 71 thereon operated by a rod 73. Thelift mechanism, per se, forms no part of the present invention except asit may enter into combination therewith.

As will be readily understood, `the boom 1 is lowered by hand into thehorizontal outstanding position shown in Figure 1. The rocker yoke 59 isrocked rearwardly and downwardly for lowering the plow beam 55 and theplow 61 to the ground and rocked upwardly and forwardly to raise saidbeam and plow. When said yoke is rocked rearwardly and downwardly, itlowers the cable 45 into slack condition so that the marker arm 29 maypivot vertically as the marker plate 41 travels over the ground. Whensaid rocker yoke S9 is rocked forwardly and upwardly to lift the plowbeam and plow 61 out of the ground, the pulley 57 is lifted to pull onthe cable 45 and lift the marker arm 29 and marker plate 41 above theground into non-marking position. When the tractor 9 is travelling onthe road or through a gate, the boom 5 may be manually swung on itsclamp 11 into the upright overbalanced position, shown in dotted linesin Figure 1, and whereby to swing the marker arm 29 and marker plate 41into elevated position close to the tractor 9.

The foregoing is considered as illustrative only of the principles ofthe invention. Further, since numerous modifications and changes willreadily occur to those skilled in the art, it is not desired to limitthe invention to the exact construction and operation shown anddescribed, and accordingly, all suitable modifications and ICOequivalents may be resorted to, falling within the scope of theinvention as claimed.

What is claimed as new is 'as follows:

l. The combination with aiool carrying beam mounted on the rockable toolbar of a tractor for vertical swinging intopposite directions rto raiseand 'lower `the tool, and a `yoke operatively connected to fsaid beamand pivoled son the tractor for raisin-g and lowering to raise and lowerthet'beam, of a boom leaving an inner end mounted on said bar andextending outwardly therefrom, 4a row marker arm, means pivotallymounting said marker arm on the outer end of rsaid boom for raising .andlowering, a Flexible member connected to said beam and marker arm, means`on said yoke engaging said member and raising and lowering `the fsameto raise and lower said 4 t marker arm when said beam is raised andlowered, and a row marker plate on said marker arm raised and loweredout of and into marking position by said marker arm.

2. The combination of claim l, said lirst means comprising a verticalcross-bar on the outer end of said boom, a rearwardly extending arm onsaid crossbar having a pulley thereon above said boom and marker arm andover which said member is trained.

Reerenees Cited in the le -of this patent UNITED STATES PATENTS 607,021Douglas JulylZ, 1898 665,587 Tannehill Jan. 8, 190i 2,l78,l24 RobinsonOct. 3l, 1939

